If--
(a) an authorised officer believes on reasonable grounds that there is occurring or about to occur any dangerous activity, and
(b) either--the authorised officer may take or cause to be taken any action the authorised officer believes on reasonable grounds to be necessary to avert, eliminate or minimise the danger.(i) a person to whom a notice under section 28 or 30 has been given has not complied with the notice, or(ii) giving such a notice to a person would not be appropriate to avert, eliminate or minimise the danger,